Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8750
Title: Ruthenium terpyridine complexes containing a pyrrole-tagged 2, 2′-dipyridylamine ligand-synthesis, crystal structure, and electrochemistry
Authors: Cheung, KC
Guo, P
So, MH
Zhou, ZY
Lee, LYS 
Wong, KY 
Issue Date: 2012
Source: Inorganic chemistry, 2012, v. 51, no. 12, p. 6468-6475 How to cite?
Journal: Inorganic Chemistry 
Abstract: Ruthenium(II) terpyridine complexes containing the pyrrole-tagged 2,2′-dipyridylamine ligand PPP (where PPP stands for N-(3-bis(2-pyridyl) aminopropyl)pyrrole with the general formula [Ru(tpy)(PPP)X] n+ (1, X = Cl -; 2, X = H 2O; 3, X = CH 3CN; tpy = 2,2′:6′,2′-terpyridine) have been synthesized and characterized by 1H NMR, IR, UV-vis, mass spectrometry, and elemental analysis. 1 and 2 have been structurally characterized by X-ray crystallography. Both 1 and 2 were successfully immobilized onto glassy carbon electrode via anodic oxidation of the pyrrole moiety on the PPP ligand to give stable and highly electroactive polymer films. Cyclic voltammetric studies of 1 in acetonitrile revealed a Ru III/Ru II couple at 0.4 V vs Cp 2Fe +/0 initially, but another redox couple resulting from chloride substitution by acetonitrile developed at E 1/2 = 0.82 V upon repetitive potential scan. This ligand substitution was induced by the acidic local environment caused by the release of protons during pyrrole polymerization. The electropolymerization of 2 in aqueous medium allowed the observation of the formation of Ru IV=O species in polypyrrole film. As the film grew thicker, the size of the Ru III/ /Ru II couple (E 1/2 = 0.8 V vs SCE at pH 1) of poly[Ru(tpy)(PPP)(OH 2)] n+ increased accordingly, whereas the growth of the Ru IV/Ru III couple (E 1/2 = 0.89 V vs SCE at pH 1) leveled off after the film had reached a certain thickness. The Pourbaix diagram of the E 1/2 of the Ru III /Ru II and Ru IV/Ru III couples vs pH of the electrolyte medium has been obtained. The resulting poly[Ru(tpy)(PPP)(OH 2)] n+ film is electrocatalytically active toward the oxidation of benzyl alcohol.
URI: http://hdl.handle.net/10397/8750
ISSN: 0020-1669
DOI: 10.1021/ic202459g
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

7
Last Week
0
Last month
0
Citations as of Sep 19, 2017

WEB OF SCIENCETM
Citations

7
Last Week
0
Last month
0
Citations as of Sep 21, 2017

Page view(s)

38
Last Week
1
Last month
Checked on Sep 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.